Shock eliminating device



C. M. SEYMOUR SHOCK ELIMINATING DEVICE Jul 12, 1932.

Filed Jan. 21, 1926' 3mm C'Zaad? I]! Jzymozzr Patented July 12, 1932iPATa rice CLAUDE M. SEYMOUR, OF ROANOKE, VIRGINIA SHOCK ELIMINATINGDEVICE Application filed January 21, 1926. Serial No. 82,716.

The present invention relates to improvements in shock absorbing oreliminating devices, and more particularly to those which are applicableto springs to check the rebound thereof and prevent the excessivecompression thereon; and thus efiectually add to the comfort andhandling of motor vehicles equipped with these devices under bad roadconditions.

The primary object of this invention is to provioe means whereby therebound of two relatir e members, such as a spring and frame, may bechecked but the compression of the two not materially affected.

Another object of the invention is to provide a simply constructed shockeliminating equipment of this character which may be readily installedupon motor vehicles and the like without changes in the design or con- 2struction of the same.

A further object of the invention is to provide a shock eliminatingdevice of this character which is capable of adjustment to meet variousrequirements found in installation and use.

With the foregoing and other objects in view, the invention will be morefully described hereinafter, and will be more particularly pointed outin the claims appended 7 hereto.

In the drawing, wherein like symbols refer to like or correspondingparts throughout the several views,

Figure 1 is a fragmentary side elevation of a portion ofa motor vehicleframe showing the spring and axle thereof, and equipped with the shockeliminating device of this invention.

Figure 2 is an enlarged transverse section taken through the same on theline 22 of Figure 1.

Figure 3 is a further enlarged section taken through one end of thedevice showing the supporting clip for holding the same in position, andV V Figure 4 is an enlarged detail section taken on the line H of Figure2 showing the bearing and connecting means for the other end of thedevice.

Referring to the drawing, designates theside bar of a vehicle frameprovided at its end with the usual horn 11' to which one end of theusual leafsp ring 12 is attached. The other end ofthe leaf spring 12 isconnected by a shackle 13 to an intermediate portion of the frame bar10. An, axle 14 isse cured by clips 15 to an intermediate portion of thespring 12, the axle 14 adapted to move toward and from the frame bar 10bythe flexing of the spring 12. g i v The present attachment is adaptedto be mounted on the spring 12 at one end of the axle l4 and comprisesa'flat spring 16 having toward the under side of the spring 12 to thedesired extent, as shown in Figure 1.

One of the clips 18 is preferablylocated a short distance from the axle14:, while the outer clip 18 is positioned toward the outer end of thespring 12, the spring 16 being of sufficient length to extend over aconsiderable portion of the spring 12. I

The shock absorbing spring 16 is provided intermediate its ends, andpreferably toward the inner end thereof,with a camber 20 or an ofisetportion which provides not only spacing means bet-ween the springs 16and 12, but also a fulcrum for the spring 16 upon which the latter mayrock and flex. The camber 20 is adapted to bear against the lower sideof the spring 12, so that the ends of the spring 16 are spaced from thespring 12 and may be drawn under the desiredtension toward the spring 12to serve as an auxiliary spring for reinforcing the spring 12 after thelatter has been compressed, under rebound action, to

a predetermined extent. It will be notedthatl the usual flexing of thespring 12 under ordinary load conditions isnot interfered with to anyextent as the spring 16 is spaced at its ends from the adjacent portionsof the spring 12.

In order to prevent any binding or wedge ing action of the inner clip 18upon the tion.

spring 12, a roller 21 is seated in a recess beneath the strap 19 of theinner clip 18 and the uppermost leaf of the spring 12. The roller 21thus permits of a free shifting of the inner clip 18 to accommodate thebending and straightening of the spring 12, particularly when subjectedto heavy load conditions. The seats 17 at opposite ends of the shockabsorbing spring 16 prevent the creeping thereof out of engagement withthe clips 18, while the camber 20 may of course shift.

against the lower side of the spring 12 to accommodate the springs 12and 16 one to the other under varying conditions of flexing.

In operation, when the device is mounted on the spring 12 as shown inFigure 1, the outer clip 18 is tightened suflicient onl to exert apressure on the camber 20 for holc ing the spring 16 in place. Vhen thespring 12 is compressed by the movement of the axle 14: toward the frame10, or vice versa, there is a tendency for the auxiliary spring 16 to bereleased from tension as the spring 16 approaches a more or lessstraight line posi- On the rebound, however, a greater pressure isexerted on the fulcrum or camber 20 on the auxiliary spring 16 and thiscreates an increased interleaf friction of the main spring 12 checkingthe rebound action of r the same by pinching the several leaves of thespring 12 together. This action, added to the resistance offered by theauxiliary spring 16 eflectively checks the rebound. By adjustment of theclips 18 it is thus apparent that the flexibility of the spring 12 maybe varied during the operation of the spring and that the flexibilitymay also be adjusted to take care of diflerent loads and differentconditions met with in the different types of springs.

It is obvious that various changes and modifications may be made in thedetails of construction and design of the above specifically describedembodiment of this invention without departing from the spirit thereof,such changes and modifications being restricted only by the scope of thefollowing claims.

What is claimed is 1. A shock eliminating device for use in connectionwith leaf springs comprising a flat spring having a camber intermediateits ends providing a fulcrum for contact with the convex side of theleaf spring, adjustable l clips mounted on the opposite ends of the flatspring for embracing the leaf spring at spaced points thereon, andanti-friction means carried by one of the clips for engag ing the leafspring to permit the shifting of the clip thereon incident to thevariable movement between the leaf and flat springs.

2. A shock eliminating device for application to leaf springs comprisinga flat spring having a camber intermediate its ends and seats at itsopposite extremities, a clipmount

